A friend with dual doctorate has been following this for a while. He recommended that FEN BEN not be used as it is not fenbendazole and most likely fraudulent and might have a tiny amount but not the amount listed. He belongs to support group on Fakebook and he encountered many people who were getting worse on it and their cancer was spreading. If you go that route read from Joe Tippens' site.
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If you go that route and I personally would get the one from Veterinary suppliers. Some will sell it and some will require a prescription. At least you know what you are getting.
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